In this article, we present an effective continuum model for a Weyl semimetal, to calculate its thermal and thermoelectric transport coefficients in the presence of a uniform concentration of torsional dislocations. We model each dislocation as a cylindrical region of finite radius , where the corresponding elastic strain is described as a gauge field leading to a local pseudo-magnetic field. The transport coefficients are obtained by a combination of scattering theory, Green's functions and the Kubo formulae in the linear response regime. We applied our theoretical results to predict the electrical and thermal conductivities as well as the Seebeck coefficient for several transition metal monopnictides, TaAs, TaP, NbAs and NbP.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11093277 | PMC |
http://dx.doi.org/10.1039/d4na00056k | DOI Listing |
Chem Sci
January 2025
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University Beijing 100084 China
Thermoelectric technology plays an important role in developing sustainable clean energy and reducing carbon emissions, offering new opportunities to alleviate current energy and environmental crises. Nowadays, GeTe has emerged as a highly promising thermoelectric candidate for mid-temperature applications, due to its remarkable thermoelectric figure of merit () of 2.7.
View Article and Find Full Text PDFMaterials (Basel)
December 2024
School of Electrical and Computer Engineering, Ben Gurion University of the Negev, Beer Sheba 8410501, Israel.
Nowadays, polycrystalline lead telluride is one of the premier substances for thermoelectric devices while remaining a hopeful competitor to current semiconductor materials used in mid-infrared photonic applications. Notwithstanding that, the development of reliable and reproducible routes for the synthesis of PbTe thin films has not yet been accomplished. As an effort toward this aim, the present article reports progress in the growth of polycrystalline indium-doped PbTe films and their study.
View Article and Find Full Text PDFSmall
January 2025
Department of Materials Science and Engineering, National Yang-Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
Silver chalcogenides exhibit exceptional transport properties but face structural instability at high temperatures, limiting their practical applications. Using AgTe as a model, it is confirm that silver whisker growth above the phase transition renders AgTe unsuitable for thermoelectric applications. Here, the whisker growth mechanism is investigated and propose an inhibition strategy, overcoming a major obstacle in using silver chalcogenides.
View Article and Find Full Text PDFNanoscale
January 2025
Department of Physics, Indian Institute of Technology Patna, Bihta, Bihar, 801106, India.
In this study, we investigate a novel hybrid borocarbonitride (bpn-BCN) 2D material inspired by recent advances in carbon biphenylene synthesis, using first-principles calculations and semi-classical Boltzmann transport theory. Our analysis confirms the structural stability of bpn-BCN through formation energy, elastic coefficients, phonon dispersion, and molecular dynamics simulations at 300 K and 800 K. The material exhibits an indirect band gap of 0.
View Article and Find Full Text PDFJ Phys Chem Lett
January 2025
School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, U.K.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!